Morgaes from Multimedia & Video Support suggested I post here.

I've tried installing Xubuntu 12.10, Lubuntu 12.10, and Lubuntu 13.04 on my Sony Vaio PCG 792L laptop, and have never gotten a lick of sound out of it, despite trying many suggestions (ie, unmuting the speakers...)

I've currently re-installed Ubuntu 10.04, and it works as before... which is to say, with sound.

But I'd sure like to use a new Lubuntu, instead - it runs so well on this! (well... except for the above-mentioned...)

Anyway, I know fixing this one issue for this one kind of laptop may not be high on anyone's list of priorities (I installed Xubuntu 12.10 on an older Sony Vaio laptop, and it was a smashing success.) But, if anyone wants my stats, or knows how I might fix it, let me know.